So, cows are a major source of methane but how do you measure how much gas a cow burps?
Zespri chairman Peter McBride is challenging employers in the horticulture sector to do more for young people in the industry.
The massive change taking place in the dairy industry has the potential to prevent ambitious young people making a career in the sector.
Young leaders in New Zealand's primary industries are essential for increasing the future prosperity of the sector.
Fonterra is setting up hubs of entrepreneurial young people to develop new business models, says Fonterra chief executive Theo Spierings.